Use the new migration system in place of persistent's one
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5 changed files with 83 additions and 2 deletions
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@ -12,6 +12,13 @@
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-- with this software. If not, see
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-- with this software. If not, see
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-- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-------------------------------------------------------------------------------
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-- Meta
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-------------------------------------------------------------------------------
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SchemaVersion
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number Int
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- People
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-- People
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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@ -65,6 +65,7 @@ import Vervis.Handler.Ticket
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import Vervis.Handler.Wiki
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import Vervis.Handler.Wiki
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import Vervis.Handler.Workflow
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import Vervis.Handler.Workflow
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import Vervis.Migration (migrateDB)
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import Vervis.Ssh (runSsh)
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import Vervis.Ssh (runSsh)
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-- This line actually creates our YesodDispatch instance. It is the second half
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-- This line actually creates our YesodDispatch instance. It is the second half
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@ -107,7 +108,8 @@ makeFoundation appSettings = do
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(pgPoolSize $ appDatabaseConf appSettings)
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(pgPoolSize $ appDatabaseConf appSettings)
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-- Perform database migration using our application's logging settings.
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-- Perform database migration using our application's logging settings.
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runLoggingT (runSqlPool (runMigration migrateAll) pool) logFunc
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--runLoggingT (runSqlPool (runMigration migrateAll) pool) logFunc
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runLoggingT (runSqlPool migrateDB pool) logFunc
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-- Return the foundation
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-- Return the foundation
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return $ mkFoundation pool
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return $ mkFoundation pool
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71
src/Vervis/Migration.hs
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71
src/Vervis/Migration.hs
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@ -0,0 +1,71 @@
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{- This file is part of Vervis.
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-
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- Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
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-
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- ♡ Copying is an act of love. Please copy, reuse and share.
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-
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- The author(s) have dedicated all copyright and related and neighboring
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- rights to this software to the public domain worldwide. This software is
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- distributed without any warranty.
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-
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- You should have received a copy of the CC0 Public Domain Dedication along
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- with this software. If not, see
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- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-}
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module Vervis.Migration
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( migrateDB
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)
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where
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import Prelude
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import Control.Monad.IO.Class (MonadIO)
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import Control.Monad.Trans.Reader (ReaderT, runReaderT)
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import Data.Maybe (fromMaybe)
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import Database.Persist
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import Database.Persist.Sql (SqlBackend, toSqlKey)
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import Database.Persist.Schema
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import Database.Persist.Schema.PostgreSQL (schemaBackend)
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import Vervis.Model
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key :: SchemaVersionId
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key = toSqlKey 1
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getDbSchemaVersion :: MonadIO m => ReaderT SqlBackend m (Maybe Int)
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getDbSchemaVersion = fmap schemaVersionNumber <$> get key
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setDbSchemaVersion :: MonadIO m => Int -> ReaderT SqlBackend m ()
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setDbSchemaVersion v = update key [SchemaVersionNumber =. v]
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-- | Run the migration system. The second parameter is the list of migration
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-- actions in chronological order. The migration process is:
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--
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-- * Check the schema version of the DB
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-- * Compare to the schema version of the app, which is the length of the list
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-- * If any migrations are required, run them
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-- * Update the schema version in the DB
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runMigrations
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:: MonadIO m
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=> SchemaBackend SqlBackend
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-> [SchemaT SqlBackend m ()]
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-> ReaderT SqlBackend m ()
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runMigrations sb migrations = do
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dver <- fromMaybe 0 <$> getDbSchemaVersion
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let aver = length migrations
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if aver < dver
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then error "Older app version running with newer DB schema version"
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else do
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let migs = drop dver migrations
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runReaderT (sequence migs) sb
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setDbSchemaVersion aver
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changes :: MonadIO m => [SchemaT SqlBackend m ()]
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changes =
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[
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]
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migrateDB :: MonadIO m => ReaderT SqlBackend m ()
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migrateDB = runMigrations schemaBackend changes
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@ -35,7 +35,7 @@ import Vervis.Model.Workflow
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-- You can define all of your database entities in the entities file.
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-- You can define all of your database entities in the entities file.
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-- You can find more information on persistent and how to declare entities at:
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-- You can find more information on persistent and how to declare entities at:
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-- http://www.yesodweb.com/book/persistent/
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-- http://www.yesodweb.com/book/persistent/
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share [mkPersist sqlSettings, mkMigrate "migrateAll"]
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share [mkPersist sqlSettings{-, mkMigrate "migrateAll"-}]
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$(persistFileWith lowerCaseSettings "config/models")
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$(persistFileWith lowerCaseSettings "config/models")
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instance HashDBUser Person where
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instance HashDBUser Person where
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@ -146,6 +146,7 @@ library
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Vervis.Import
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Vervis.Import
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Vervis.Import.NoFoundation
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Vervis.Import.NoFoundation
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Vervis.MediaType
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Vervis.MediaType
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Vervis.Migration
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Vervis.Model
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Vervis.Model
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Vervis.Model.Entity
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Vervis.Model.Entity
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Vervis.Model.Group
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Vervis.Model.Group
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